The music of the spheres : $b A nature lover's astronomyGrondal, Florence Armstrong
Science
The music of the spheres : $b A nature lover's astronomy
Grondal, Florence Armstrong
Astronomy
John H. Thayer in his interesting article on Saturn in _Popular
Astronomy_, March, 1919, says: "If you want to see a picture painted as
only the hand of God can paint it, go with me to Saturn." He then
beautifully describes the scene of the wonderful band of silvery light
which arches the sky near the equator, and the bewildering panorama of
many moons, full round disks, quarter phases and thin crescents
displayed in the Saturnian nights. Not only would the nights be
startling to an earth-being; during the daytime their tiny sun would
skim across the sky at the rate of about the distance of the diameter of
the moon in every minute, and then after the sun literally dropped below
the horizon, the stars and crescents and disks and quarters of moons
would shoot across equally fast.
Suppose all the inhabitants of the solar system were forced to exist in
a medium like the ocean, for instance, to know nothing of such celestial
scenes; perhaps the unfortunate inhabitants of Venus can see no
more clearly through that dense atmosphere which surrounds their globe.
"One might think that the atmosphere was made transparent with this
design, to give man in the heavenly bodies, the perpetual presence of
the sublime. If the stars should appear one night in a thousand years,
how would men believe and adore; and preserve for many generations the
remembrance of the city of God which had been shown! But every night
come out these envoys of beauty, and light the universe with their
admonishing smile."
--_Emerson._
The crowning glory of Saturn, its thin flat ring, is poised above the
huge body without in any way touching it. Although this ring appears as
a solid piece, it is now known positively that it is made up of swarms
of meteors or exceedingly minute satellites, all whirling round and
round Saturn in the same plane. It may easily be seen why a brightly
swirling mass of these shining moons would seem as one object at such a
distance.
Through a large telescope it becomes apparent that Saturn's ring is
really composed of three rings lying one inside of the other, the two
outer rings, which are about 11,000 and 18,000 miles in width, being
separated by a dark, narrow clean-cut space of about 2200 miles.
The third ring is a thin, faint inner ring, so transparent that the
planet may be seen shining through it. It is about the same width as the
outer ring, 11,000 miles, and its inner edge lies only 6000 miles above
the surface of the planet. This inner ring is called the "crape ring"
because it has a dusky look. It is believed to be the inner ring
thinning off toward the planet. It has been suggested that the crape
ring may have originated from collisions of particles in the bright
ring, thus reducing their orbits, and that the rings of Saturn are
slowly shrinking down upon the planet and will sometimes in the future
have entirely disappeared.
Public-domain text, read in full here on John Shaqi.
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